Porasarja KWB 424290 20 kpl

The KWB 424290 HSS-M2 Titanium Mini Drill Set contains 20 precision drill bits with diameters from 0.3 mm to 1.6 mm. Made from high-speed HSS-M2 steel with a titanium nitride coating, the set is supplied in a compact storage box and is intended for fine, special drilling tasks in model making, electronics work on printed circuit boards and jewelry making.

Advantages

Drill bits are manufactured from HSS-M2 steel for wear resistance and edge retention, with a titanium nitride (TiN) surface treatment to extend tool life and reduce friction. The small diameter range (0.3–1.6 mm) covers very fine drilling needs. The bits are supplied in a handy storage box that keeps the set organized and protects the cutting edges.

Suitable for

Key specifications

How to use

Select the required drill diameter for your task and secure the workpiece. Use a low to moderate spindle speed appropriate for small-diameter HSS drills and ensure steady feed to avoid breaking the bit. For printed circuit boards and delicate materials, use light pressure and consider backing the board to prevent splintering. Replace worn bits to maintain drilling accuracy.

Recommendations

For best results, use appropriate holding tools (pin vice or micro-chuck) and start holes with a center punch or pilot mark when possible. Keep the bits clean and store them in the supplied box. For metal and hard materials, apply cutting oil sparingly to improve tool life; for plastics and PCBs, avoid excess lubrication.